Metalation of Cyclic Pseudopeptidic Thiosulfinates with Ni(II) and Zn(II) after Ring Opening: A Mechanistic Investigation
作者:Erwan Galardon、Emilie Bourles、Isabelle Artaud、Jean-Claude Daran、Pascal Roussel、Alain Tomas
DOI:10.1021/ic062480m
日期:2007.5.1
with a Ni(II) salt leads after ring cleavage under alkaline conditions to the isolation of diamidato/thiolato/sulfinato complexes. These two thiolato/sulfinato complexes of nickel, which can also be prepared by dioxygen oxidation of the parent diamidato/dithiolato complexes, were characterized by X-ray crystallography. They show a square-planar geometry with a S-bonded sulfinato ligand. A similar reaction
硫代亚硫酸盐是一类新兴的氧化硫,通常被认为与生化过程有关。12和10元环假肽硫代亚磺酸盐1a(4,4,7,7-四甲基-1,3,4,7,8,10-六氢-5,6,1,10-苯并二氮杂二氮杂环十二烷e-2, 9-二酮5氧化物)和1b(3,3,6,6-四甲基-1,8-二氢-4,5,1,8-苯并二硫二氮杂嗪-2,7(3H,6H)-二酮4氧化物) Ni(II)盐与Ni(II)盐在碱性条件下环裂解后导致分离出diamidato / thiolato / sulfinato配合物。通过X射线晶体学表征了镍的这两种硫醇基/磺基磺酸盐络合物,它们也可以通过母体二mid杂/二硫醇基络合物的双氧氧化来制备。它们显示具有S键合的磺胺配体的方形平面几何形状。1b与Zn(II)盐之间的相似反应通过中间形成硫代巯基/亚磺酸酯的混合形成了硫键与磺基磺酸盐的配合物,并带有O键合的亚磺酸盐。基于1 H NMR,IR和质量分析,